A coepobatioixt



Patented Dec. 30, 1919.

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ROLLIN H. WHITE, 01? CLEVELAND HEIGHTS, OHIO, ASSIGNOR THE CLEVELAND TRACTOR COMPANY, OF EUCLID, OHIO, A CORPORATION OF OHIQ.

TRACK-LAYING TBACTOR eas es. I

Specification of Letters Eatent.

Patented Dec. 3h, 19m.

Application filed May 1, 1919. Serial Ito. 293,988.

To all whom it may concern.-

Be it known that I, ROLLIN H. VVHITE, a citizen of the United States, residing at Cleveland Heights, in the county of Guya- 5 hog-a and State of Ohio, have invented a certain new and useful Improvement in Track- Laying Tractors, of which the following is a full, clear, and exact description.

In nearly all of the varieties of track layio ing tractors which have had any substantial degree of practical success, the main frame has suitable load supporting connections with two track frames located on. opposite sides thereof; and these track frames have been provided with wheels or rollers which make rolling contact with the ground reaches of the track belt, which thereby ultimately.

supports the load. When the tractor is operating on rough ground, the ground reaches 2c of the track, as they are laid down, obviously assume wavy up and down position. The wheels, as they roll upon the track, are therefore continously going up and down small inclines presented by the track. The object ofthis invention is to minimize the transmission to the trucks of these up and down increments of the wheels; and to do this by inexpensive means.

The invention consists in the construction so and combination of parts shown in the drawings and hereinafter described and pointed out definitely in the appended claim.

In the drawings, Figure 1 is a side elevation of a tractor in which the present inven tion is embodied; F ig. 2 is a transverse sectional view one side being in the plane of line ca on Fig. 1, and the other side being in the plane of line Z1b.

The invention is exemplified in connection with such a track laying tractor substantially as is shown and described in my .prior Patent No. 1353;319.

As shown. in the drawings, 10 represents 15 the main frame of the machine. On each side thereof is, a track frame 20 which is pivotally hung on a lateral extension of the rear axle 14-, on which also the driving 'sprocket 4-1 is rotatably mounted. A spring to 16 connects the front ends of the track frame with the main frame: An idler wheel 42 is gnounted on each track frame near its front land. Each endless track belt goes around a rear sprocket and a front idler. Each track frame carries one or more pairs of track wheels 44: adapted to make rolling lcjoptact with the ground reaches of the track The present invention relates to the means for mounting these wheels or rollers upon to the track frame.

. Each track frame includes two parallel spaced apart side beams 21, 22. Each beam includes an angle bar 23 having an outwardly extended horizontal web or flange. By outwardly is meant extending in a direction away from the space between the two beams.

The track wheels at are located between the two beams, and theyare associated in as pairs. One wheel of each pair is rotatably mounted in a transversely extended shaft 31 which is rigidly fixed to the front end of two rocking levers 30, while the other wheel 44 is rotatably mounted on a transversely we extended shaft 82 fixed to the rear end of said two lovers Each of these levers is pivotally suppor ed by a U-shaped bracket 35 which is fixed to the outwardly extending horizontal flange so of one of the side members of the track frame, that is to say, one U-shaped bracket is fixed to the horizontal flange associated with the outside frame member, and the other is fixed to the horizontal flange associ- 85 ated with the inside frame member. Eachv of the [two levers 30 goes between the upwardly extended ears of (the associated bracket, and both lovers are pivoted to the.

bracket, by a pin 37 which extends trans eo versely through the ears of both brackets and, through the associated levers. At the front and rear ends of both levers there is a split sleeve in which is fitted and clampbd the shaft on which one of the track wheels as is mounted.

Having described my invention, I claim In a track laying tractor having a main frame and track frames connected to opposite sides thereof, the combination with the 10?? two spacer apart sicle nmnhms of a frame, with two iavers A ated E29 nppemm sides of the track frmme, on zflinad axes, a shaft wl'lich eXtQnds betwean and communed with the hunt ends 91 the two law/rs a, second shaft which is wnnectmi Winn the rear ends of. the two lemm and ismck an ro'taizibly' on sa. two shafts and are ]0 between the mvo side members of the (5111x015 frame;

In testin'mny whereof I hereunto affix my signature.

HOLLIN H. W'H-ITE.

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